GP - Report all current lock waits

SQL to list out all locks that are waiting.

select bl.pid as blocked_pid, 
a.usename as blocked_user, 
ka.current_query as blocking_statement, 
now() - ka.query_start as blocking_duration, 
kl.pid as blocking_pid, 
ka.usename as blocking_user, 
a.current_query as blocked_statement, 
now() - a.query_start as blocked_duration 
from pg_catalog.pg_locks bl 
join pg_catalog.pg_stat_activity a 
on bl.pid = a.procpid 
join pg_catalog.pg_locks kl 
join pg_catalog.pg_stat_activity ka 
on kl.pid = ka.procpid 
on bl.pid != kl.pid 
where not bl.granted and
kl.pid != pg_backend_pid()

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